package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordEditFailedException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password=DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void save(EmployeeDTO employeeDTO) {
       Employee employee=new Employee();
       //拷贝
        BeanUtils.copyProperties(employeeDTO,employee);

        //设置账号状态
        employee.setStatus(StatusConstant.ENABLE);
        //设置密码
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //设置时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        //设置创建人ID和修改人ID
        //
        //当前线程的ID
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.save(employee);
    }

    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        //开始分页查询
        //获取
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page=employeeMapper.page(employeePageQueryDTO);
        //获取总记录数
        long total= page.getTotal();
        List<Employee> list=page.getResult();
        return new PageResult(total,list);
    }

    /**
     * 启用禁用
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        employeeMapper.startOrStop(status,id);
    }

    /**
     * 员工修改
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee=new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        //更新时间
        employee.setUpdateTime(LocalDateTime.now());
        //更新
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }

    @Override
    public Employee selectById(Long id) {
        Employee employee=employeeMapper.selectById(id);
        return employee;
    }

    @Override
    public void updatePassword(PasswordEditDTO passwordEditDTO) {
        passwordEditDTO.setEmpId(BaseContext.getCurrentId());
        Employee employee=employeeMapper.selectById(passwordEditDTO.getEmpId());
        String password= employee.getPassword();
        String oldPassword= passwordEditDTO.getOldPassword();
        String newPassword= passwordEditDTO.getNewPassword();
        if (oldPassword.equals(newPassword))
            {
                throw new PasswordEditFailedException("旧密码不得与新密码重复");
            }
        if(!DigestUtils.md5DigestAsHex(oldPassword.getBytes()).equals(password))
            {
                throw new PasswordEditFailedException("MessageConstant.PASSWORD_ERROR");
            }
        //此处需要加密传入
        passwordEditDTO.setNewPassword(DigestUtils.md5DigestAsHex(newPassword.getBytes()));
        employeeMapper.updatePassword(passwordEditDTO);
    }
}
